This will definitely power your iPhone.
According to a Digitimes report, both Apple and Samsung are considering adding Taiwan-based solar manufacturers to their supply chains for use of solar panels in their future products. It may be a while before we see this as the report suggests that “according to Taiwan-based solar firms, these niche markets will need a longer time to develop.”
Chances are you won’t see a solar powered iPhone 5, or even an iPhone 6. It may be something that may take several years to be implimented, if ever, to consumer products like the iPhone and the iPad. On the bright side, the sun will probably burn for another 5 billion years, so there’s plenty of time.